JP3800409B2 - Rotational drive for internal combustion engine testing - Google Patents

Rotational drive for internal combustion engine testing Download PDF

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JP3800409B2
JP3800409B2 JP2002057228A JP2002057228A JP3800409B2 JP 3800409 B2 JP3800409 B2 JP 3800409B2 JP 2002057228 A JP2002057228 A JP 2002057228A JP 2002057228 A JP2002057228 A JP 2002057228A JP 3800409 B2 JP3800409 B2 JP 3800409B2
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ring gear
engagement
internal combustion
combustion engine
radial direction
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JP2003254867A (en
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佳史 奥田
弥彦 岩崎
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Daifuku Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M15/00—Testing of engines
    • G01M15/04—Testing internal-combustion engines
    • G01M15/042—Testing internal-combustion engines by monitoring a single specific parameter not covered by groups G01M15/06 - G01M15/12
    • G01M15/044—Testing internal-combustion engines by monitoring a single specific parameter not covered by groups G01M15/06 - G01M15/12 by monitoring power, e.g. by operating the engine with one of the ignitions interrupted; by using acceleration tests

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  • Chemical & Material Sciences (AREA)
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  • Physics & Mathematics (AREA)
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  • Transmission Devices (AREA)
  • Testing Of Engines (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、検査用位置に位置する内燃機関のリングギヤの回転軸心周りに回転駆動される回転体と、前記リングギヤの径方向に移動自在に前記回転体に支持されて、径方向内方側への移動により前記リングギヤに係合自在な係合部材と、その係合部材を前記リングギヤの径方向に移動させて、そのリングギヤに係合する係合位置と係合を解除する解除位置とに切り換え操作する切り換え操作手段とが設けられた内燃機関テスト用の回転駆動装置に関する。
【０００２】
【従来の技術】
上記の内燃機関テスト用の回転駆動装置は、内燃機関を着火せずに回転させて検査する、いわゆるコールドテストを行うときに使用されるものである。ちなみに、このコールドテストのときの検査項目は、吸気バルブの開閉タイミングや排気バルブの開閉タイミングなどのバルブ関係や、インジェクションノズルの動作など、種々のものがある。
【０００３】
このような内燃機関用の回転駆動装置の従来例として、特開平１０−１１５５７６号公報に開示されるものがあった（以下、第１従来例と呼称する）。
すなわち、図８に示すように、検査用位置に位置する内燃機関１４０の主軸（クランク軸）１４１に装着されたリングギヤ１４３の回転軸心（以下、リングギヤ回転軸心と略称）の周りに駆動回転される回転体１０３が設けられ、その回転体１０３にリングギヤ１４３の径方向（以下、リングギヤ径方向と略称）にスライド移動自在に支持されて、径方向内方側への移動によりリングギヤ１４３に係合自在な係合部材１３０が設けられ、その係合部材１３０をリングギヤ径方向に移動させて、そのリングギヤ１４３に係合する係合位置と係合を解除する解除位置とに切り換え操作する切り換え操作手段１１０が設けられ、係合部材１３０をリングギヤ１４３に係合させた状態で、回転体１０３を回転させることにより、リングギヤ１４３を回転させるものである。
前記係合部材１３０は、その基端側が回転体１０３に支持された片持ち状に設けられて、その先端部にリングギヤ１４３に係合する係合部１３６を備えるようになっている。
【０００４】
切り換え操作手段１１０は、回転体１０３の軸心周り、つまり、リングギヤ回転軸心周りで駆動回転される出力軸１０１に軸心方向に移動自在に外嵌された筒体１０６と、回転体１０３に揺動自在に枢支されて、その揺動によって係合部材１３０をリングギヤ径方向に係止移動させるＬ字状リンク１２７とを備えて、筒体１０６のリングギヤ回転軸心方向の移動によりＬ字状リンク１２７を揺動させるように、筒体１０６がＬ字状リンク１２７を係止するように構成されている。
ちなみに、図中、１０２は出力軸１０１を駆動回転させる電動モータ、１０７は筒体１０６をリングギヤ回転軸心方向に移動操作するシリンダである。
そして、回転体１０３は、基枠１１１に回転自在に軸受１１２にて支持され、この回転体１０３と筒体１０６とが、リングギヤ回転軸心方向に相対移動自在で且つ一体回転するようにキーにて連結され、筒体１０６が、回転軸１０１に一体回転するように連結されている。
要するに、この第１従来例は、シリンダ１０７にて筒体１０６をリングギヤ回転軸心方向に移動操作することによりＬ字状リンク１２７を揺動させ、その揺動により係合部材１３０をリングギヤ径方向にスライド移動させて、係合位置と解除位置とに切り換えるように構成されている。
【０００５】
又、このような回転駆動装置の別の従来例として、特開平２−１３７３２号公報に開示されるものがあった（以下、第２従来例と呼称する）。
すなわち、図９に示すように、検査用位置に位置する内燃機関（図示せず）の主軸（クランク軸）２１３に装着されたリングギヤ２２５の回転軸心（以下、リングギヤ回転軸心と略称）の周りに駆動回転される軸状の回転体２２８が設けられ、その回転体２２８にリングギヤ２２５の径方向（以下、リングギヤ径方向と略称）に移動するように揺動自在に支持されて、径方向内方側への移動によりリングギヤ２２５に係合自在な係合部材２３６が設けられ、その係合部材２３６をリングギヤ径方向に移動させて、リングギヤ２２５に係合する係合位置と係合を解除する解除位置とに切り換え操作する切り換え操作手段２４０が設けられ、係合部材２３６をリングギヤ２２５に係合させた状態で、回転体２２８を回転させることにより、リングギヤ２２５を回転させるものである。
前記係合部材２３６は、リングギヤ径方向内方側の基端側が回転体２２８に揺動自在支持され、リングギヤ径方向外方側の先端側がリングギヤ回転軸心方向に沿ってリングギヤ２２５側に折り曲げられたＬ字状に形成されて、その先端部にリングギヤ２２５に係合する係合部２３９を備えるようになっている。
【０００６】
切り換え操作手段２４０は、回転体２２８に軸心方向、つまり、リングギヤ回転軸心方向に移動自在に外嵌された筒状体２３２と、その筒状体２３２に対して軸受けを介して相対回転自在且つリングギヤ回転軸心方向に移動自在に外嵌状態に装着された円盤状の回転部材２３４とを備えて、その回転部材２３４の先端部が、係合部材２３６の中間部に連結ピン２３５を用いて枢支連結されて、筒状体２３２のリングギヤ回転軸心方向の移動により係合部材２３６を係合位置と解除位置とに切り換えるように構成されている。
ちなみに、図中、２１２は回転体２２８を駆動回転させる電動モータ、２４４は筒状体２３２をリングギヤ回転軸心方向に移動操作するシリンダであって、枢支軸２４１を中心に揺動する揺動リンク２４２を介して、前記筒状体２３２と連動連結されている。
要するに、この第２従来例は、シリンダ２４４にて筒状体２３２をリングギヤ回転軸心方向に移動操作することにより、係合部材２３６をリングギヤ径方向に揺動させて、係合位置と解除位置とに切り換えるように構成されている。
【０００７】
【発明が解決しようとする課題】
内燃機関を検査するにあたり、従来では、例えば１２００ｒｐｍ等、低速にて内燃機関を回転させて検査することが行われていたが、検査内容の充実や検査精度の向上等のために、例えば４０００ｒｐｍ等、内燃機関を高速で回転させて検査することが望まれている。
上記の第１従来例において、内燃機関を高速で回転させるようにすると、回転体に対してリングギヤ径方向にスライド移動自在に支持された係合部材が、大きな遠心力にて径方向外方に移動しようとするものとなる。この大きな遠心力に抗して係合部材を係合位置に保持させるようにするには、係合部材をリングギヤ径方向内方側に操作する操作力が十分に強くなるように、シリンダの操作力を高める必要があるが、このように係合部材をリングギヤ径方向内方側に操作する操作力を高めようとすると、構成が煩雑になるばかりでなく、リングギヤが回転していない停止状態やリングギヤを低速にて回転させる低速回転状態において、係合部材がリングギヤを径方向内方側に強く押圧して、リングギヤを損傷させてしまう虞があり、この第１従来例の構成にて、内燃機関を高速回転させるようにできないものであった。
【０００８】
また、上記の第２従来例においても、内燃機関を高速で回転させるようにすると、回転体に対してリングギヤ径方向に揺動自在に支持された係合部材が、大きな遠心力にて径方向外方に移動しようとするものとなる。そして、このように大きな遠心力に抗して係合部材を係合位置に保持させるようにするには、上記第１従来例と同様に、係合部材をリングギヤ径方向内方側に操作する操作力が十分に強くなるように、シリンダの操作力を高める必要があり、その結果、この第２従来例の構成は、第１従来例と同様に、内燃機関を高速回転させるようにできないものであった。
要するに、上記第１従来例及び上記第２従来例の構成は、内燃機関を高速にて回転させて検査するのに使用できないものであり、内燃機関を高速にて検査するのに用いることができる内燃機関検査用の回転駆動装置が望まれていた。
【０００９】
本発明は、かかる点に着目してなされたものであり、その目的は、リングギヤの損傷を抑制しながらも、内燃機関を高速にて回転させることができる内燃機関テスト用の回転駆動装置を提供する点にある。
【００１０】
【課題を解決するための手段】
請求項１の内燃機関テスト用の回転駆動装置は、検査用位置に位置する内燃機関のリングギヤの回転軸心周りに回転駆動される回転体と、
前記リングギヤの径方向に移動自在に前記回転体に支持されて、径方向内方側への移動により前記リングギヤに係合自在な係合部材と、
その係合部材を前記リングギヤの径方向に移動させて、そのリングギヤに係合する係合位置と係合を解除する解除位置とに切り換え操作する切り換え操作手段とが設けられたものであって、
前記係合部材が、前記リングギヤの回転軸心方向に沿う方向での一端部に前記リングギヤに係合する係合部を備え、且つ、前記リングギヤの回転軸心方向に沿う方向での中間部を支点に前記リングギヤの径方向に揺動自在に枢支されて、前記中間部を支点にした揺動によって前記係合部を前記リングギヤの径方向に移動されるように構成され、
前記切り換え操作手段が、
前記リングギヤの回転軸心方向に沿って往復移動自在に支持される往復移動部材と、
前記リングギヤの径方向に沿う姿勢で配置されて、前記係合部材の他端部と前記往復移動部材との夫々に両端が枢支されたリンク部材とを備えて、
前記往復移動部材を前記リングギヤの回転軸心方向に移動させて、前記係合部材を前記係合位置と前記解除位置とに切り換えるように構成されている点を特徴とする。
【００１１】
すなわち、往復移動部材をリングギヤの回転軸心方向に往復移動させると、リングギヤの回転軸心方向に沿う方向での中間部を支点にリングギヤの径方向に揺動する係合部材は、リングギヤの径方向に沿う姿勢で配置されたリンク部材にて押し引き操作されることになり、その押し引きによりリングギヤの径方向に揺動されて、リングギヤに係合する係合位置や係合が解除された解除位置に操作されることになる。そして、リングギヤに係合部材を係合させた状態で回転体を回転駆動させることにより、リングギヤを回転駆動する、つまり、内燃機関を回転駆動できることになる。
【００１２】
リングギヤに係合部材を係合させた状態で回転体を回転駆動させると、係合部材には遠心力が作用するが、係合部材は、リングギヤの回転軸心方向に沿う方向での中間部を支点にリングギヤの径方向に揺動するように回転体に支持されるものであるから、係合部材における係合部を備える一端側、及び、係合部材におけるリンク部材が枢支される他端側の夫々に遠心力が作用するものとなるため、両側の遠心力の夫々にて係合部材を回転させる逆方向の力が互いに打ち消しあうことにより、遠心力によって係合部材を回転させる力を小さくできる。つまり、前記支点周りでの重量バランスが、係合部存在側となる一端側が重い場合、リンク部材枢支側となる他端側が重い場合、及び、一端側田他端側とを同じになる場合とが考えられるが、いずれの場合にも両側の遠心力の夫々にて係合部材を回転させる逆方向の力が打ち消しあうことにより、遠心力によって係合部材を回転させる力を小さくできる、あるいは、無いようにすることができる。
【００１３】
しかも、前記支点周りでの重量バランスが係合部存在側となる一端側が重い場合には、遠心力にて、係合部材はリングギヤから離れる側に向けて揺動する傾向となり、前記支点周りでの重量バランスがリンク部材枢支側となる他端側が重い場合、遠心力にて、係合部材はリングギヤに接近する側に向けて揺動する傾向となり、前者の場合には、係合部材がリングギヤから離れる側に向けて揺動しようとするのを、リンク部材が突っ張り作用により支持し、後者の場合には、係合部材がリングギヤに接近する側に向けて揺動しようとするのを、リンク部材が引っ張り作用にて支持するものとなるが、係合部材と往復移動部材とを連結するリンク部材がリングギヤの径方向に沿う姿勢で配置されているから、リンク部材が突っ張り作用や引っ張り作用で係合部材の揺動を支持するときに、往復移動部材にその移動方向への力が作用し難いようにすることができる。
つまり、上記突っ張りや引っ張りにより係合部材の揺動をリンク部材が支持するときにおいて、往復移動部材は、リングギヤの回転軸心方向と直交する方向には大きな力を受けるが、その移動方向つまりリングギヤの回転軸心方向には大きな力を受けないものであり、その傾向は、リンク部材の径方向での姿勢が、往復移動部材の移動方向であるリングギヤの回転軸心方向と直交する状態に近いほど大きくなるのである。
【００１４】
上記如く、係合部材がリングギヤの回転軸心方向の中間部を支点に揺動されること、並びに、リンク部材がリングギヤの径方向に沿う姿勢で配置されていることにより、係合部材をリングギヤに係合する係合位置に保持するにあたり、例えリングギヤを高速で回転させても、往復移動操作部材はその移動方向には大きな力が作用しないようにすることができるものとなり、換言すれば、往復移動部材を係合部材の係合位置に相当する位置に保持させるに要する力が小さなもので済むようになるのであり、例えば往復移動部材をシリンダにて操作する場合においても、シリンダの操作力を大きくしないで済むようになる。
【００１５】
上述した通り、リングギヤを高速で回転させても、往復移動部材を係合部材の係合位置に相当する位置に保持させるのに要する力が小さなもので済むようになるから、リングギヤが回転していない停止状態やリングギヤを低速にて回転させる低速回転状態において、係合部材がリングギヤを径方向内方側に強く押圧して、リングギヤを損傷させてしまう虞も無くなるものであり、もって、リングギヤの損傷を抑制しながらも、内燃機関を高速にて回転させることができる内燃機関テスト用の回転駆動装置を得るに至った。
【００１６】
請求項２の内燃機関テスト用の回転駆動装置は、請求項１の特徴に加えて、 前記係合部材が、前記支点周りでの重量バランスを前記係合部存在側と前記係合部非存在側とを等しくする、又は、前記係合部存在側を前記係合部非存在側よりもわずかに軽くするように構成されている点を特徴とする。
【００１７】
すなわち、係合部材における支点周りでの重量バランスが、係合部存在側となる一端側と係合部非存在側となる他端側とを等しくする、又は、一端側を他端側よりも軽くするようにして、遠心力にて、係合部材がリングギヤに向けて強い力で揺動しない傾向となるようにして、高速回転により大きな遠心力が作用しても、係合部材がリングギヤを押圧して損傷することが無いようにしてある。
【００１８】
つまり、係合部材における支点周りでの重量バランスを一端側と他端側とが同じになるようにする、又は、一端側が他端側よりもわずかに軽くなるようにすることにより、遠心力にて係合部材がリングギヤから離れる側に揺動することが無いようにして、高速回転による大きな遠心力が作用しても、係合部材がリングギヤに係合する状態を的確に維持させるようになっており、一層便利に使用できる内燃機関テスト用の回転駆動装置を得るに至った。
【００１９】
請求項３の内燃機関テスト用の回転駆動装置は、請求項１又は２の特徴に加えて、前記回転体が、電動モータにて駆動回転されるように構成されている点を特徴とする。
【００２０】
すなわち、電動モータにて回転体を駆動回転させる構成を採用することによって、油圧モータなどを用いる場合に較べて構成が簡素化できるのみならず、回転体の駆動回転速度を種々変更しながら、つまり、内燃機関を低速度や高速度で回転させながら、種々の検査を行うことができるのであり、一層便利に使用できる内燃機関テスト用の回転駆動装置を得るに至った。
【００２１】
【発明の実施の形態】
以下、本発明の実施の形態を図面に基づいて説明する。
内燃機関テスト用の駆動装置は、図１及び図２に示すように、検査用位置に位置する内燃機関２の主軸（クランク軸）３と一体回転するリングギヤ４を駆動回転させて、内燃機関２を検査のために駆動回転させるものであって、リングギヤ４の回転軸心（以下、リングギヤ回転軸心と略称）の周りに駆動回転される三角板状の回転体９（図３参照）と、リングギヤ４の径方向（以下、リングギヤ径方向と略称）に移動自在に回転体９に支持されて、径方向内方側の移動によりリングギヤ４に係合自在な係合部材１２と、その係合部材１２をリングギヤ径方向に移動させて、そのリングギヤ４に係合する係合位置と係合を解除する解除位置とに切り換え操作する切り換え操作手段Ｆとを主要部として備えており、係合部材１２を解除位置に操作した状態で、内燃機関２と本回転駆動装置との相対位置を決め、その後で、係合部材１２を係合位置に切り換え操作し、回転体９を駆動回転させることにより、内燃機関２を駆動回転させる。検査が終わると、係合部材１２を解除位置に切り換え操作して、内燃機関２を検査用位置から移動させることは勿論である。
【００２２】
以下、各部について詳述する。
図２に示すように、基枠１の上部には電動モータ６が搭載されると共に、支持枠２０が上方に立設する状態で基枠１に設けられている。
支持枠２０には、出力軸８がリングギヤ回転軸心と同心状に軸受け３０を用いて回転自在に支持され、この出力軸８と前記電動モータ６とが、継ぎ手７を用いて一体回転するように連動連結され、出力軸８の内燃機関側の先端部に、前記回転体９が一体回転するようにボルトにて固定された状態で取り付けられており、回転体９が電動モータ６にて駆動回転されるようになっている。
【００２３】
前記係合部材１２は、リングギヤ回転軸心方向での一端部、つまり、内燃機関側の一端部に前記リングギヤ４に係合する係合部１３を備え、且つ、リングギヤ回転軸心方向での中間部を支点Ｐにしてリングギヤ径方向に揺動自在となるように、連結ピン１４にて回転体９の外周部に枢支されるものであって、前記中間部を支点Ｐとした揺動によって、係合部１３をリングギヤ４の径方向に移動させるように構成されている。
又、係合部材１２は、前記支点Ｐ周りでの重量バランスが係合部存在側を係合部非存在側よりもわずかに軽くするように構成されて、回転駆動されたときの遠心力により、リングギア４に係合する側に移動する傾向にあるようになっている。
尚、本実施形態では、図３に示すように、係合部材１２は、周方向に間隔を隔てて３個設けられている。
【００２４】
前記切り換え操作手段Ｆは、リングギヤ回転軸心方向に往復移動自在に支持される往復移動部材１１と、リングギヤ径方向に沿う姿勢で配置されて、係合部材１２の他端部と往復移動部材１１との夫々に両端が枢支されたリンク部材１６とを備えて、往復移動部材１１をリングギヤ回転軸心方向に移動させて、係合部材１２を係合位置（図６参照）と解除位置（図７参照）とに切り換えるように構成されている。
説明を加えると、前記往復移動部材１１は、筒状に形成されて、リングギヤ回転軸心方向に往復移動自在に前記出力軸８に外嵌されている。そして、その内燃機関側の先端部には、リンク部材枢支連結用のブラケットを備えた連結枠１１ａがボルト固定されている。
【００２５】
図４及び図５に明示するように、前記往復移動部材１１の外周部には、連係用筒体１８が、軸受３１を介して相対回転自在に且つ軸心方向に一体移動自在に装着されている。リングギヤ回転軸心と交差する軸心の横軸１９周りで揺動自在な揺動アーム１７が設けられている。
この揺動アーム１７は、前記連係用筒体１８の外周部を囲む筒状部１７ａを備えて、連係用筒体１８を覆う状態で揺動するように構成されている。この揺動アーム１７の筒状部１７ａと前記連係用筒体１８とが、連係リンク２２にて、リングギヤ回転軸心方向つまり出力軸８の回転軸心方向に移動自在に連動連結されている。
前記揺動アーム１７の先端部と前記支持枠２０との間には、シリンダ２１が装着されている。
【００２６】
従って、この切り換え操作手段Ｆは、前記シリンダ２１にて揺動アーム１７を揺動させることによって、往復移動部材１１をリングギア回転軸心方向に沿って往復移動させて、前述の如く、係合部材１２が係合位置と解除位置とに切り換えられるように構成されている。
そして、係合部材１２を係合位置に切り換えた状態において、リングギヤ４つまり内燃機関２を回転駆動すると、遠心力にて、係合部材１２がリングギヤ４に係合する側へ向かう力を受けることになるが、係合部材１２がリングギヤの回転軸心方向の中間部を支点Ｐに揺動されること、並びに、リンク部材１６がリングギヤ４の径方向に沿う姿勢で配置されていることにより、係合部材１２をリングギヤ４に係合する係合位置に保持するにあたり、例えリングギヤ４を高速で回転させても、往復移動部材１１はその移動方向には大きな力が作用しないようにすることができるものとなり、換言すれば、往復移動部材１１を係合部材１２の係合位置に相当する位置に保持させるに要する力が小さなもので済むようになっている。
【００２７】
尚、図中２４は、係合部材１２及び回転体９等の外周を覆うカバーを兼ねた構造体であって、前記支持枠２０に片持ち状に支持されている。そして、その先端部には、エンジン位置決め部を備えた半円弧状部材２５が設けられている。
【００２８】
〔別実施形態〕
次に別実施形態を説明する。
（１）上記実施形態では、出力軸を電動モータにて回転駆動させる場合を例示したが、油圧モータなどの他の駆動装置にて回転駆動させる形態で実施してもよい。
【００２９】
（２）上記実施形態では、係合部材が、中間部の支点周りでの重量バランスを係合部存在側を係合部非存在側よりもわずかに軽くするように構成する場合を例示したが、中間部の支点周りでの重量バランスを、係合部存在側とリンク部材の枢支側とで同じになるように構成して実施してもよい。尚、リンク部材の枢支側が重くなるように構成することも考えられるが、係合部材が遠心力にてリングギヤから離れる側に揺動する傾向となるため、実用上好ましいものではない。
【００３０】
（３）上記実施形態では、係合部材を周方向に等間隔で３個設ける場合を例示したが、２個や４個以上設けて実施してもよく、係合部材の設置数や周方向における配置は種々変更できる。
【図面の簡単な説明】
【図１】内燃機関テスト用の回転駆動装置の概略平面図
【図２】内燃機関テスト用の回転駆動装置の縦断側面図
【図３】係合部材の装着部を示す正面図
【図４】揺動アームの装着部を示す側面図
【図５】図４におけるＡ−Ａ′断面図
【図６】係合部材のリングギヤへの係合状態を示す側面図
【図７】係合部材のリングギヤへの係合を解除した状態を示す側面図
【図８】第１従来例の回転駆動装置の概略縦断側面図
【図９】第２従来例の回転駆動装置の概略縦断側面図
【符号の説明】
２ 内燃機関
４ リングギヤ
６ 電動モータ
９ 回転体
１１ 往復移動部材
１２ 係合部材
１３ 係合部
１６ リンク部材
Ｆ 切り換え操作手段
Ｐ 支点[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rotating body that is rotationally driven around a rotation axis of a ring gear of an internal combustion engine located at an inspection position, and is supported by the rotating body so as to be movable in the radial direction of the ring gear, An engagement member that is freely engageable with the ring gear by moving the ring gear, and an engagement position for engaging the ring gear and a release position for releasing the engagement by moving the engagement member in the radial direction of the ring gear. The present invention relates to a rotary drive device for testing an internal combustion engine provided with switching operation means for performing switching operation.
[0002]
[Prior art]
The above-described rotational drive device for testing an internal combustion engine is used when performing a so-called cold test in which an internal combustion engine is rotated and inspected without being ignited. By the way, there are various inspection items during the cold test, such as valve relations such as the opening / closing timing of the intake valve and the opening / closing timing of the exhaust valve, and the operation of the injection nozzle.
[0003]
As a conventional example of such a rotary drive device for an internal combustion engine, there is one disclosed in Japanese Patent Laid-Open No. 10-115576 (hereinafter referred to as a first conventional example).
That is, as shown in FIG. 8, it is driven to rotate around the rotation axis of the ring gear 143 (hereinafter abbreviated as the ring gear rotation axis) mounted on the main shaft (crankshaft) 141 of the internal combustion engine 140 located at the inspection position. The rotating body 103 is provided, and is supported by the rotating body 103 so as to be slidable in the radial direction of the ring gear 143 (hereinafter, abbreviated as the ring gear radial direction). A switching operation in which a freely engaging engagement member 130 is provided, and the engagement member 130 is moved in the radial direction of the ring gear to switch between an engagement position for engaging the ring gear 143 and a release position for releasing the engagement. Means 110 is provided, and the ring gear 143 is rotated by rotating the rotating body 103 with the engagement member 130 engaged with the ring gear 143. It is intended to be.
The engagement member 130 is provided in a cantilever shape whose base end side is supported by the rotating body 103, and has an engagement portion 136 that engages with the ring gear 143 at the distal end portion thereof.
[0004]
The switching operation means 110 includes a cylindrical body 106 that is externally fitted to the output shaft 101 that is driven and rotated around the axis of the rotating body 103, that is, around the rotation axis of the ring gear, and the rotating body 103. And an L-shaped link 127 that is pivotably supported and locks and moves the engagement member 130 in the radial direction of the ring gear by the swinging. The L-shaped link 127 moves in the ring gear rotation axis direction. The cylindrical body 106 is configured to lock the L-shaped link 127 so as to swing the link 127.
Incidentally, in the figure, reference numeral 102 denotes an electric motor that drives and rotates the output shaft 101, and 107 denotes a cylinder that moves the cylindrical body 106 in the ring gear rotation axis direction.
The rotating body 103 is rotatably supported by a bearing 112 on a base frame 111, and the rotating body 103 and the cylindrical body 106 can be moved relative to each other in the direction of the ring gear rotation axis and can be rotated integrally. The cylindrical body 106 is connected to the rotating shaft 101 so as to rotate integrally therewith.
In short, this first conventional example swings the L-shaped link 127 by operating the cylinder 106 to move in the ring gear rotation axis direction by the cylinder 107, and the engagement member 130 is moved in the ring gear radial direction by the swing. And is switched to the engagement position and the release position.
[0005]
Another conventional example of such a rotational drive device is disclosed in Japanese Patent Laid-Open No. 2-13732 (hereinafter referred to as a second conventional example).
That is, as shown in FIG. 9, the rotational axis of a ring gear 225 (hereinafter abbreviated as a ring gear rotational axis) mounted on a main shaft (crankshaft) 213 of an internal combustion engine (not shown) located at an inspection position. A shaft-like rotating body 228 that is driven and rotated around is provided, and is supported by the rotating body 228 so as to be able to move in the radial direction of the ring gear 225 (hereinafter, abbreviated as the ring gear radial direction). An engagement member 236 that can be engaged with the ring gear 225 by inward movement is provided, and the engagement member 236 is moved in the radial direction of the ring gear to release the engagement position and engagement with the ring gear 225. Switching operation means 240 is provided for switching to the release position to be operated, and by rotating the rotating body 228 in a state where the engaging member 236 is engaged with the ring gear 225, the ring 225 is rotated. It is intended to rotate the Ya 225.
The engagement member 236 has a proximal end on the inner side in the ring gear radial direction supported by the rotating body 228, and a distal end on the outer side in the radial direction of the ring gear is bent toward the ring gear 225 along the ring gear rotational axis direction. It is formed in an L-shape, and an engagement portion 239 that engages with the ring gear 225 is provided at the tip thereof.
[0006]
The switching operation means 240 has a cylindrical body 232 that is externally fitted to the rotary body 228 so as to be movable in the axial direction, that is, the ring gear rotational axis direction, and is rotatable relative to the cylindrical body 232 via a bearing. And a disk-shaped rotating member 234 mounted in an externally fitted state so as to be movable in the ring gear rotation axis direction, and a tip of the rotating member 234 uses a connecting pin 235 at an intermediate portion of the engaging member 236. The engagement member 236 is switched between the engagement position and the release position by the movement of the cylindrical body 232 in the ring gear rotation axis direction.
Incidentally, in the figure, 212 is an electric motor for driving and rotating the rotating body 228, 244 is a cylinder for moving the cylindrical body 232 in the direction of the ring gear rotation axis, and swings around the pivot shaft 241. The cylinder 232 is interlocked and connected via a link 242.
In short, in the second conventional example, by moving the cylindrical body 232 in the ring gear rotation axis direction by the cylinder 244, the engagement member 236 is swung in the ring gear radial direction, so that the engagement position and the release position are It is comprised so that it may switch to.
[0007]
[Problems to be solved by the invention]
Conventionally, when inspecting an internal combustion engine, the inspection was performed by rotating the internal combustion engine at a low speed such as 1200 rpm. However, in order to enhance the inspection contents and improve the inspection accuracy, for example, 4000 rpm or the like. It is desired to inspect the internal combustion engine by rotating it at a high speed.
In the first conventional example, when the internal combustion engine is rotated at a high speed, the engaging member supported so as to be slidable in the ring gear radial direction with respect to the rotating body is moved radially outward by a large centrifugal force. It will be something to move. In order to hold the engagement member in the engagement position against this large centrifugal force, the cylinder is operated so that the operation force for operating the engagement member inwardly in the radial direction of the ring gear is sufficiently strong. Although it is necessary to increase the force, if the operation force for operating the engagement member inwardly in the ring gear radial direction is increased in this way, not only the configuration becomes complicated, but also the stop state where the ring gear is not rotating or In a low-speed rotation state in which the ring gear is rotated at a low speed, the engaging member may strongly press the ring gear radially inward to damage the ring gear. The engine could not be rotated at high speed.
[0008]
Also in the second conventional example described above, when the internal combustion engine is rotated at a high speed, the engaging member supported so as to be able to swing in the radial direction of the ring gear with respect to the rotating body is radiated by a large centrifugal force in the radial direction. Will be going to move outward. In order to hold the engagement member in the engagement position against such a large centrifugal force, the engagement member is operated inwardly in the ring gear radial direction as in the first conventional example. It is necessary to increase the operating force of the cylinder so that the operating force becomes sufficiently strong. As a result, the configuration of the second conventional example cannot make the internal combustion engine rotate at a high speed like the first conventional example. Met.
In short, the configurations of the first conventional example and the second conventional example cannot be used to inspect the internal combustion engine by rotating it at high speed, and can be used to inspect the internal combustion engine at high speed. There has been a desire for a rotary drive device for inspection of an internal combustion engine.
[0009]
The present invention has been made paying attention to this point, and an object of the present invention is to provide a rotational drive device for testing an internal combustion engine capable of rotating the internal combustion engine at a high speed while suppressing damage to the ring gear. There is in point to do.
[0010]
[Means for Solving the Problems]
An internal combustion engine test rotary drive device according to claim 1, wherein the rotary body is rotationally driven around the rotation axis of the ring gear of the internal combustion engine located at the inspection position;
An engagement member that is supported by the rotating body so as to be movable in the radial direction of the ring gear, and is engageable with the ring gear by moving radially inward;
Switching operation means for moving the engagement member in the radial direction of the ring gear to switch between an engagement position for engaging the ring gear and a release position for releasing the engagement;
The engaging member includes an engaging portion that engages with the ring gear at one end in the direction along the rotational axis direction of the ring gear, and an intermediate portion in the direction along the rotational axis direction of the ring gear. Pivotally supported by a fulcrum in the radial direction of the ring gear, and configured to move the engagement portion in the radial direction of the ring gear by swinging with the intermediate portion as a fulcrum;
The switching operation means is
A reciprocating member which is supported so as to freely reciprocate along the rotational axis direction of the ring gear;
A link member that is disposed in a posture along the radial direction of the ring gear, and that has both ends pivotally supported by the other end of the engagement member and the reciprocating member,
The reciprocating member is moved in the direction of the rotational axis of the ring gear to switch the engaging member between the engaging position and the releasing position.
[0011]
That is, when the reciprocating member is reciprocated in the rotational axis direction of the ring gear, the engaging member that swings in the radial direction of the ring gear about the intermediate portion in the direction along the rotational axis direction of the ring gear is the diameter of the ring gear. The link member arranged in a posture along the direction is pushed and pulled, and the push / pull swings in the radial direction of the ring gear to release the engagement position and the engagement with the ring gear. It will be operated to the release position. Then, by rotating the rotating body with the engagement member engaged with the ring gear, the ring gear can be rotationally driven, that is, the internal combustion engine can be rotationally driven.
[0012]
When the rotating body is driven to rotate with the engagement member engaged with the ring gear, centrifugal force acts on the engagement member, but the engagement member is an intermediate portion in the direction along the rotational axis direction of the ring gear. Is supported by the rotating body so as to swing in the radial direction of the ring gear with the fulcrum as a fulcrum, and one end side including the engaging portion in the engaging member, and the link member in the engaging member being pivotally supported Since the centrifugal force acts on each of the end sides, the force that rotates the engaging member by the centrifugal force is reversed by the opposite forces that rotate the engaging member by the centrifugal force on both sides cancel each other. Can be reduced. That is, when the weight balance around the fulcrum is heavy on one end side that is the engaging portion existing side, the other end side that is the link member pivot side is heavy, and the other end side is the same as the other end side However, in any case, the force in the opposite direction that rotates the engaging member by the centrifugal force on both sides cancels out, so that the force that rotates the engaging member by the centrifugal force can be reduced, or , You can avoid it.
[0013]
In addition, when the weight balance around the fulcrum is heavy on the one end side where the engagement portion is present, the engagement member tends to swing toward the side away from the ring gear due to centrifugal force, and around the fulcrum. When the other end, which is the link member pivot side, is heavy, the engagement member tends to swing toward the side closer to the ring gear due to centrifugal force. In the former case, the engagement member is The link member supports the swinging action toward the side away from the ring gear by the tension action, and in the latter case, the engaging member tries to swing toward the side approaching the ring gear. The link member is supported by the pulling action, but the link member that connects the engaging member and the reciprocating member is arranged in a posture along the radial direction of the ring gear. When supporting the swinging of the engagement member in use, force in the direction of movement to the reciprocating member can be made to hardly act.
In other words, when the link member supports the swinging of the engaging member by the above-described tension or tension, the reciprocating member receives a large force in a direction orthogonal to the direction of the rotation axis of the ring gear. The direction of the rotational axis of the ring member is not subjected to a large force, and the tendency thereof is close to the state in which the posture of the link member in the radial direction is orthogonal to the rotational axis direction of the ring gear that is the moving direction of the reciprocating member. It gets bigger.
[0014]
As described above, the engaging member is swung around the intermediate portion in the rotational axis direction of the ring gear, and the link member is disposed in a posture along the radial direction of the ring gear, so that the engaging member is moved to the ring gear. When the ring gear is rotated at a high speed, the reciprocating operation member can be prevented from applying a large force in its moving direction, in other words, The force required to hold the reciprocating member at a position corresponding to the engaging position of the engaging member can be reduced. For example, even when the reciprocating member is operated by the cylinder, the cylinder operating force It will not be necessary to increase the size.
[0015]
As described above, even if the ring gear is rotated at a high speed, the force required to hold the reciprocating member at a position corresponding to the engagement position of the engagement member can be reduced. There is no possibility that the engagement member will strongly press the ring gear radially inwardly and damage the ring gear in a non-stop state or in a low-speed rotation state where the ring gear is rotated at a low speed. It came to obtain the rotation drive device for an internal combustion engine test which can rotate an internal combustion engine at high speed, suppressing damage.
[0016]
According to a second aspect of the present invention, in addition to the feature of the first aspect, the engagement member has a weight balance around the fulcrum and the engagement portion present side and the engagement portion absent. It is characterized in that it is configured such that the side is equal, or the side where the engaging portion is present is slightly lighter than the side where the engaging portion is not present.
[0017]
That is, the weight balance around the fulcrum in the engagement member is equal to one end side that is the engagement portion existence side and the other end side that is the engagement portion non-existence side, or one end side is more than the other end side. Even if a large centrifugal force is applied due to high-speed rotation, the engagement member does not move the ring gear. There is no damage caused by pressing.
[0018]
That is, by making the weight balance around the fulcrum of the engaging member the same at the one end side and the other end side, or by making the one end side slightly lighter than the other end side, Thus, the engagement member is prevented from swinging away from the ring gear, and even when a large centrifugal force is applied due to high-speed rotation, the engagement member is accurately maintained in engagement with the ring gear. As a result, a rotation drive device for testing an internal combustion engine that can be used more conveniently has been obtained.
[0019]
According to a third aspect of the present invention, in addition to the features of the first or second aspect, the rotary body is configured such that the rotating body is driven and rotated by an electric motor.
[0020]
That is, by adopting a configuration in which the rotating body is driven and rotated by the electric motor, the configuration can be simplified as compared with the case of using a hydraulic motor or the like, while the driving rotation speed of the rotating body is variously changed, that is, Since various tests can be performed while rotating the internal combustion engine at a low speed or a high speed, a rotation drive device for testing an internal combustion engine that can be used more conveniently has been obtained.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the internal combustion engine test drive device drives and rotates a ring gear 4 that rotates integrally with a main shaft (crankshaft) 3 of the internal combustion engine 2 located at the inspection position, thereby causing the internal combustion engine 2 to rotate. And a triangular plate-like rotating body 9 (see FIG. 3) that is driven and rotated around a rotation axis of the ring gear 4 (hereinafter abbreviated as a ring gear rotation axis), and a ring gear. 4, an engagement member 12 that is supported by the rotating body 9 so as to be movable in the radial direction of the ring 4 (hereinafter, abbreviated as the ring gear radial direction) and that can be engaged with the ring gear 4 by movement inward in the radial direction. 12 is provided as a main part with switching operation means F for moving the ring gear 12 in the radial direction of the ring gear to switch between the engagement position for engaging the ring gear 4 and the release position for releasing the engagement. To the release position In this state, the relative position between the internal combustion engine 2 and the rotary drive device is determined. Thereafter, the engagement member 12 is switched to the engagement position, and the rotary body 9 is driven to rotate, thereby driving the internal combustion engine 2. Rotate. When the inspection is completed, the engagement member 12 is switched to the release position and the internal combustion engine 2 is naturally moved from the inspection position.
[0022]
Hereinafter, each part is explained in full detail.
As shown in FIG. 2, the electric motor 6 is mounted on the upper portion of the base frame 1, and the support frame 20 is provided on the base frame 1 in a state of standing upward.
The output shaft 8 is supported on the support frame 20 so as to be rotatable using a bearing 30 concentrically with the ring gear rotation axis, and the output shaft 8 and the electric motor 6 are integrally rotated using the joint 7. The rotating body 9 is attached to the tip of the output shaft 8 on the internal combustion engine side in a state where the rotating body 9 is fixed by bolts so as to rotate integrally, and the rotating body 9 is driven by the electric motor 6. It is designed to be rotated.
[0023]
The engagement member 12 includes an engagement portion 13 that engages with the ring gear 4 at one end portion in the ring gear rotation axis direction, that is, one end portion on the internal combustion engine side, and an intermediate portion in the ring gear rotation axis direction. It is pivotally supported on the outer peripheral portion of the rotating body 9 by the connecting pin 14 so that it can swing in the ring gear radial direction with the portion as a fulcrum P, and by swinging with the intermediate portion as the fulcrum P The engaging portion 13 is configured to move in the radial direction of the ring gear 4.
The engaging member 12 is configured such that the weight balance around the fulcrum P is slightly lighter on the side where the engaging part is present than on the side where the engaging part is not present. , Tend to move to the side engaged with the ring gear 4.
In the present embodiment, as shown in FIG. 3, three engaging members 12 are provided at intervals in the circumferential direction.
[0024]
The switching operation means F is disposed in a posture along the radial direction of the ring gear, the reciprocating member 11 supported so as to be reciprocally movable in the ring gear rotation axis direction, and the other end of the engaging member 12 and the reciprocating member 11. And a link member 16 pivotally supported at both ends, and the reciprocating member 11 is moved in the direction of the ring gear rotation axis so that the engaging member 12 is engaged (see FIG. 6) and released ( (See FIG. 7).
In other words, the reciprocating member 11 is formed in a cylindrical shape and is externally fitted to the output shaft 8 so as to be reciprocally movable in the ring gear rotation axis direction. And the connection frame 11a provided with the bracket for link member pivotal support is bolted to the front-end | tip part by the side of the internal combustion engine.
[0025]
As clearly shown in FIGS. 4 and 5, the linking cylinder 18 is attached to the outer peripheral portion of the reciprocating member 11 through a bearing 31 so as to be relatively rotatable and integrally movable in the axial direction. Yes. A swing arm 17 is provided that can swing around a horizontal axis 19 of an axis that intersects the ring gear rotation axis.
The swing arm 17 includes a cylindrical portion 17 a surrounding the outer peripheral portion of the linkage cylinder 18 and is configured to swing in a state of covering the linkage cylinder 18. The tubular portion 17 a of the swing arm 17 and the linking cylinder 18 are linked and linked by a linkage link 22 so as to be movable in the ring gear rotation axis direction, that is, in the rotation axis direction of the output shaft 8.
A cylinder 21 is mounted between the tip of the swing arm 17 and the support frame 20.
[0026]
Accordingly, the switching operation means F causes the reciprocating member 11 to reciprocate along the ring gear rotation axis direction by oscillating the oscillating arm 17 by the cylinder 21, as described above. The member 12 is configured to be switched between an engagement position and a release position.
When the ring gear 4, that is, the internal combustion engine 2 is rotationally driven in a state where the engagement member 12 is switched to the engagement position, the engagement member 12 receives a force toward the engagement side of the ring gear 4 by centrifugal force. However, the engaging member 12 is swung to the fulcrum P at the intermediate portion in the rotational axis direction of the ring gear, and the link member 16 is arranged in a posture along the radial direction of the ring gear 4. When the engaging member 12 is held at the engaging position where the engaging member 12 is engaged with the ring gear 4, even if the ring gear 4 is rotated at a high speed, the reciprocating member 11 is prevented from exerting a large force in its moving direction. In other words, the force required to hold the reciprocating member 11 at a position corresponding to the engaging position of the engaging member 12 is small.
[0027]
In the figure, reference numeral 24 denotes a structure that also serves as a cover that covers the outer periphery of the engaging member 12 and the rotating body 9 and is supported by the support frame 20 in a cantilever manner. A semicircular member 25 having an engine positioning portion is provided at the tip.
[0028]
[Another embodiment]
Next, another embodiment will be described.
(1) Although the case where the output shaft is rotationally driven by an electric motor has been illustrated in the above embodiment, the output shaft may be rotationally driven by another drive device such as a hydraulic motor.
[0029]
(2) In the above embodiment, the case where the engaging member is configured to make the weight balance around the fulcrum of the intermediate portion slightly lighter on the engaging portion existing side than on the engaging portion non-existing side is exemplified. The weight balance around the fulcrum of the intermediate portion may be configured to be the same on the engaging portion existence side and the pivot side of the link member. In addition, although it can also be considered that the pivot side of the link member is heavy, it is not practically preferable because the engaging member tends to swing away from the ring gear by centrifugal force.
[0030]
(3) In the above embodiment, the case where three engagement members are provided at equal intervals in the circumferential direction is illustrated, but two or four or more engagement members may be provided, and the number of engagement members installed and the circumferential direction may be provided. Various arrangements can be made.
[Brief description of the drawings]
FIG. 1 is a schematic plan view of a rotary drive device for testing an internal combustion engine. FIG. 2 is a vertical side view of the rotary drive device for testing an internal combustion engine. FIG. 5 is a cross-sectional view taken along the line AA ′ in FIG. 4. FIG. 6 is a side view showing an engagement state of the engagement member with the ring gear. FIG. 8 is a side view schematically showing a rotary drive device according to a first conventional example. FIG. 9 is a side view schematically showing a rotary drive device according to a second conventional example. ]
2 Internal combustion engine 4 Ring gear 6 Electric motor 9 Rotating body 11 Reciprocating member 12 Engaging member 13 Engaging portion 16 Link member F Switching operation means P Support point

Claims (3)

検査用位置に位置する内燃機関のリングギヤの回転軸心周りに回転駆動される回転体と、
前記リングギヤの径方向に移動自在に前記回転体に支持されて、径方向内方側への移動により前記リングギヤに係合自在な係合部材と、
その係合部材を前記リングギヤの径方向に移動させて、そのリングギヤに係合する係合位置と係合を解除する解除位置とに切り換え操作する切り換え操作手段とが設けられた内燃機関テスト用の回転駆動装置であって、
前記係合部材が、前記リングギヤの回転軸心方向に沿う方向での一端部に前記リングギヤに係合する係合部を備え、且つ、前記リングギヤの回転軸心方向に沿う方向での中間部を支点に前記リングギヤの径方向に揺動自在に枢支されて、前記中間部を支点にした揺動によって前記係合部を前記リングギヤの径方向に移動されるように構成され、
前記切り換え操作手段が、
前記リングギヤの回転軸心方向に沿って往復移動自在に支持される往復移動部材と、
前記リングギヤの径方向に沿う姿勢で配置されて、前記係合部材の他端部と前記往復移動部材との夫々に両端が枢支されたリンク部材とを備えて、
前記往復移動部材を前記リングギヤの回転軸心方向に移動させて、前記係合部材を前記係合位置と前記解除位置とに切り換えるように構成されている内燃機関テスト用の回転駆動装置。A rotating body that is rotationally driven around the rotational axis of the ring gear of the internal combustion engine located at the inspection position;
An engagement member that is supported by the rotating body so as to be movable in the radial direction of the ring gear, and is engageable with the ring gear by moving radially inward;
A switching operation means for moving the engagement member in the radial direction of the ring gear to switch between an engagement position for engaging the ring gear and a release position for releasing the engagement is provided for an internal combustion engine test. A rotary drive device,
The engaging member includes an engaging portion that engages with the ring gear at one end in the direction along the rotational axis direction of the ring gear, and an intermediate portion in the direction along the rotational axis direction of the ring gear. It is pivotally supported by a fulcrum in the radial direction of the ring gear, and is configured to move the engagement part in the radial direction of the ring gear by swinging with the intermediate part as a fulcrum.
The switching operation means is
A reciprocating member supported so as to be reciprocally movable along the rotational axis direction of the ring gear;
A link member that is disposed in a posture along the radial direction of the ring gear, and that has both ends pivotally supported by the other end of the engagement member and the reciprocating member,
An internal combustion engine test rotary drive device configured to move the reciprocating member in the direction of the rotational axis of the ring gear to switch the engagement member between the engagement position and the release position. 前記係合部材が、前記支点周りでの重量バランスを前記係合部存在側と前記係合部非存在側とを等しくする、又は、前記係合部存在側を前記係合部非存在側よりもわずかに軽くするように構成されている請求項１記載の内燃機関テスト用の回転駆動装置。The engagement member makes the weight balance around the fulcrum equal between the engagement portion existence side and the engagement portion non-existence side, or the engagement portion existence side is more than the engagement portion non-existence side. 2. The rotary drive device for testing an internal combustion engine according to claim 1, wherein the rotary drive device is configured to be slightly lighter. 前記回転体が、電動モータにて駆動回転されるように構成されている請求項１又は２に記載の内燃機関テスト用の回転駆動装置。The rotary drive device for an internal combustion engine test according to claim 1 or 2, wherein the rotary body is configured to be driven and rotated by an electric motor.
JP2002057228A 2002-03-04 2002-03-04 Rotational drive for internal combustion engine testing Expired - Fee Related JP3800409B2 (en)

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